Apparatus for washing, separating, and grading materials



Sept, 2%,, H. :50 GERKEN 1,729,070

APPARATUS FOR WASHING, SEPARATING, AND GRADING MATERIALS Filed Feb. 271926 5 Sheets-Sheet l m Q L) //V VENTO/Q Sept. 24, 1929. k H. s. GERKEN1,729,070

APPARATUS FOR WASHING, SEPARATING, AND GRADING MATERIALS Filed Feb; 27,1926 5 Sheets-Sheet 2 Sept. 24, 1929. H. s. GERKEN APPARATUS FORWASHING, SEPARAT ING, AND GRADING MATERIALS Filed Feb. 27, 1926 5Sheets-Sheet 5 Y 2% 25' 'w'l WJ Sept. 24, 1929. H. s. GERKEN 1,729,070

I I APPARATUS FOR WASHING, SEPARATING, AND GRADING MATERIALS Filed Feb.27, 1926 5 Shets-Sheet 4 A ffO/ZA/EKQ Sept. 24, E929. H. s. GERKEN1,729,070

APPARATUS FOR WASHINQ, SEPARATING, AND GRADING MATERIALS Filed Feb. 271926 5 sheets sheet 5 4/ fly/r Pasta Sept. 24, 1929 UNITED s A rEsPATENT F I E:

HOWARD s. GEBCKEN, or BUFFALO, NEW YORK, AssIeNoR, BY'LDIRECT ANDMESNEASSIGNMENTS, 'ro eRAvEL PRODUCTS CORP RATIO or UFFALO, EW YORK,

A CORPORATION or New YORK APPARATUS r02. WASHING, sEr RA'rINe, AND:GRADINGJrm'rnRI zs Application filed February 27, 1926. Serial NO.91,207.

This invention relates to improvements in apparatus for washing andseparating or grading materials, as for instance, sand and gravel fromwaterways. I

' 5 One object of the invention is to provide a practical and efficientapparatus for the pur-' pose stated adapted to thoroughly andexpeditiously wash, separate and grade, sand and gravel orthe like atthe source of supply and deliver the separated materials to suitablereceptacles in a clean condition substantially free from excess water.-A

Other objects of the invention are to provide an apparatus of thissort'adapted to first 1 separate the undesirable material from that andalso to provide automatic means for in termittently dumping this washedmaterial without discharging any substantial quantity of the washingwater therewith from the e0 settling boxes; and also to provide anapparatus of this sort having an upper trough for effecting the primarywashing of the material and separating therefromthe coarse refuse,

a a lower trough for receiving a portion of the. 3 desired materlal,means between 831d upper and lower troughs for separating a part of thedesired material and discharging the same from the apparatus, and meansfor receiving-the remaining desired material and delivering it to saidlower, trough; also to provide the troughs with separate, spaced,separating and washing units which are constructed and adapted to, beinterchangeably mounted on said troughs so that these units 5 ean'bechanged fromone position: to another on either trough in accordance withthe kind or condition of the material -to'be washed, 'separated andgraded.

Further objectsareto construct a washing,

0 separating and grading apparatus particularly a'daptedto beused on aboat or scow, so that it can be positioned lengthwise of the boat overthe hold or hatches, whereby, the washed, separatedmaterial can bedischarged from the apparatus into separate compartmen-ts in the hold,or delivered to one 'Or another' part of the hold as maybe desired tosegregate the difierent grades-of material or evenly load the boat; andto construct the supporting means so that said means and theapparatuscan be moved bodily to a lateral position on the boat to permitunobstructed acc'ess to the hold of the heat through the hatches; andalso to construct said supporting means for said apparatus, so that thesame 'may be collapsed ,or lowered to permit the passage of an unloadingor other apparatus on the boat over said washing, separating and gradingapparatus, and to form a compact unit having its center of gravitydisposed close to the deck to'avoid swaying or dislocation of theapparatus in rough weather;

Other objects are to improve and simplify apparatus of the sortdescribed in the other respects hereinafter specified and claimed.

In the drawings Fig. '1 is a side elevation of amaterial washing,separating and grading apparatus embodying the invention arrangedlengthwise over the hatches of a boat, a portion of which is shown insection.

Fig. 2 is a similar rviewithereof in its collapsedor inoperativeposition at one side of the boat.

Fig. 3 is a fragmentary plan view of the boat with the apparatus inoperative posi tion above the holds or hatches of the boat.

Fig. is a transverse sectionof the upper portion of the boat showing theapparatus in operative position admidship in full lines, and in itscollapsed, inoperative position at one side of the boat in broken lines.

Fig. 5 is an end elevation, on an enlarged scale, of the materialreceiving end ofthe apparatus. 1

V. F i'g. 6 is a transverse, vertical section of the apparatus, on line6-6, Fig. 7

Fig. ,6 is a detail trans arse section, on an enlarged scale, ofthe'means for adjustably of the apparatus on line 10- 10, Fig. 11.

Fig. 11 is a transverse section thereof on line 11-41, Fig. 10.

Fig. 12 is a plan view ofa baffle plate used inthe primary separatingunits.

Fig. 13'is alongitudinal, vertical section,

' v onfan enlarged scale, of one of the primary separating units, online 13-13, Fig. 8.

Fig-14 is a plan view of one of the intermediate separating and gradingscreens or units of the apparatus, on line 14--14, Fig.

6, on an enlarged scale.

Fig. 15 is a fragmentary, sectional plan view thereof on line 1515, Fig.6.

Fig. '16 is a fragmentary, transverse, vertical section thereof, on line16-16, Fig. 14, showing the same detached from the apparatus. I

Fig. 17 is a longitudinal section thereof, on line 17-17, Fig.18.

, Fig. 18 is a fragmentary, transverse secf 'tion thereof, on anenlarged scale, on line 1.8--18, Fig. 14.

. The material washing, separating and grad- Ping apparatus embodyingthe invention is preferably installed-on a boat or scow and com rises,generally, a pump 10 arranged on the oat A, and adapted to suck sand,gravel and water from the bed of a river or other body of'water, throughany usual nozzle and hose 12 and deliver these materials through astandpipe or assage 13 to the ugper end '45 of an inclined c ute orflume 14. T 1s -flume extends lengthwise of the boat over the hatchwaysB of the hold C'which preferably is divided into compartments forreceiving the separated and graded materials. The chute 14 is rigidlymounted on a series of transverse, vertical and movable-supports orframes 11, 11 and 11 which will be described later.

Coarse separating or screening units 15 are which it is conductedoverboar beneath the chute 14 arranged in spaced relation along thebottom ofthe chute 14 through which screens. pass all of the gravel andsand which are to be vre,- tained,together with a art of the water,whiletherocks and other un esirable, coarse refuse 5 material pass overthescreens with a portlon of the water and are dischar ed from the lower,end of 'the'chute into a opper or box 16,and thence-to apassage or pipethrough Arranged lengthwise and also rigidly supported on the frame 11,

11 and 11 is a trough 20,'preferably of substantially the same size asthe chute 14, and

21 represents inclined screens or separating units which may be arrangedinpairs, with each pairof screens exten ing laterally and downwardly inopposite directions from the chute 14 immediately below one of thescreening units 15. Theseilateral screens 21, are adapted to receivematerial and water from said screens 15 and permit the gravel or coarseportions of the material to ta l off over their lower ends and fall intothe desired compartments in the hold C, while the water and sand orother fine material passing through these screens may be received uponinwardly inclined and transversely. arranged trays or plates 23 whichdirect the sand and water mto the lower trough 20. The trough 20 isprovided with'spaced washing and settling boxes or units 24 dependinfrom the bottom of the-tron h and into which the sand collects and iswas ed and from which it is intermittently discharged into receivingcompartments in the hold, as will be explained later.

The upper screening units 15 can be of any suitable construction adaptedfor the purpose, those shown comprising grates or screens 15 formed ofbars 25 extending lengthwise of the chute 14 and spaced apart accordingto the size of material to be accepted, and rigidly connected by endcross bars 26. Each screen ported in a rectangular frame 27 havingopposite end bars 28 and side bars 29. V The side ars 29 are detachablysecured .to the undersides of the channels or members'30 forming thesidewalls of the chute 14, as by bolts or fastening devices 31. The ends ofscreen bars 25 are preferably seated or positioned in slots 32 formed bycutting awayv portions of the end bars 28, see Figs. Band 13, so as toprovide 15, see Figs. 8, 9 and 13, is removably sup- I portions whichoverhang said ends and prevent the accidental detachment of the screens.

The discharge-of the material through the screen 15 is preferablycontrolled b a pair 'of slide valves or gates 34 of suita le-con-.structionmovable-laterally in guides on bottom flanges 35 at theopposite ends of the frame 27, Figs. 9 and 13, 'so that b appropriateadjustment of these gates, t e 'material can be discharged uniformlyamidships, or towards one or another part of the hold to 'evenlyload theboat, or by closing the valves in some of the units 15, the materialwill pass over these units and discharge into are employed, as willbeexfilained. Due. to the relatively hig .velocity ofthe waterandimaterial passing along the chute 14 over the screen units 15constructed as thus far described, the material and water directedthrough said screens has a tendency to discharge obliquely'forward anddownward,.and

to spread laterally. It is desirable, however,

other compartments. These gates are particularly useful when the lateralscreens 21 in the present se arating apparatus, to be able to restrictespread of the material so that it will not fall beyond the sides of thegates 34 in such manner as not to interfere with the operation of saidgates. Each bafile plate has a central aperture 38, the area of which issubstantially less than the screen opening, whereby ledges or baflles 39are, provided at all four sides of the screen upon which some of thematerial and 'water impinges and which, in flowing inwardly over theledges 39 toward the aperture 38, causes a counter current whichintercepts and inixes with the material going directly through theaperture and turns it from its oblique and laterally'spreading courseand reduces its velocity, so that all of the material and water passingthrough each unitfalls substantially straight down into the trough 20.This feature is particularly adapted for use when the lateral screens 21and inclined plates'23 are omitted, and material is discharged directlyto the washing and settling units 24.

- Each of thelateral separating screens 21 said side bars and engagingover the ad includes a removable grate or screen formed of spaced rods40 which extend laterally relatively to the chute 14 and are rigidlyconnected together by cross bars '41. 1

Each screen, see Figs. 14 to 1.8, is remov- 4 ably supported in arectangular frame 42 in any suitable manner, as by, engaging the endsofthe rods 40 in notches or seats 43 in an end bar 44 ofthe frame, andthe ends of the cross bars 41 in notches in the upper ed esof the frameside bars'45, and securing t e in this position by hook bolts 46 securedto jacentsc'reen rods .40.. T e, screen frames 42 are 'pivotallyconnected to each other and supported at' their upper or inner ends bymeans of a hinge rod 48, arran 'e'd len' hwise substantially'centrallybeneat the c ute 14 andbearing in de f'ndin transverse plates 49, whichare pre erably Ited or otherwise (letachably connected to the transverseframe liars 27 of the units 15, see Fig. 13.

As .shown clearly in. Figs. 6 and 18, the top, surfaces of the screens21' lie substantially flush with'the upper edges of thelower end bars44'ofthe frames 42, and the screen rods 40, are so spaced that,.as' themixed material and water-is dischar' ed from 1 the screening units15it'flows ownwardly on the screen 21, andthe sand and water will passbetween the rods40 and fell upon the to the adjacent end bar 44 andhaving inclined plates 23, while the gravel will travel down the screen21-and tail oil over the lower ends thereof and fall through the. openhatches into the hold of the boat.

The upper or outer. ends of the inclined trays or plates 23 arevdisposed beneath and adjacent the end bars 44 of the screens 21, whiletheir inner ends rest on the top edges-of the side Walls 52 of thetrough 20. .In order to direct and confine all sand and water tosaid'plates and prevent spilling-thereof over screen and deflect it in,theopposite direction downwardly along the late 23.

Means are provlded or permitting the inclined screens 2 1,to be adjustedto different inclinations, so as'to retard or accelerate the velocity ofthe material passing over the screens and-thus further control theseparation of the material. That is, if the velocity is retarded,relatively more of thematerial will pass through the screens, while ifthe velocity is increased, less material will pass through. Thus, byadjusting the screens in accordance with the proportions of the mixture,the correct or desired separation can be accurately maintained.

FOI'thlS pur each tion to being pivoted to the hinge rod 48, is alsopivotall attached at its outer end to its companion p ate 23, as by apivot rod 56 passing through the-ends of the-side bars 45 of the screenandthrough lugs 57at the outer corners of the plate 23, see Figs. 15 and18. For holding the screens in'their adjusted posiscreen v21, in addi-'cent'its lower end with a'depending bar 58 having spaced notches 59 anyone of which 'is" engageable over a fixed upstanding projec .tion 60 onthe adjacent wall of the trough 20, 7

see Fi 6 and 6". Any othersuitable means for a justably holding thescreens 21 and plates '23 may be used. Guard plates '61, see I Fig. 18,.are preferably secured to the side bars 45 adjacent the outer endsof thescreens- 21 to prevent the material from passing later flector 54.

sand or fine material will now be described. Each-box, see'Figs. 6, 7and 11', comprises a.

7 ally oil? the plate .23 as it strikes the de- The washing-and settlingboxes for the 1 2* hopper 62,0pei1 at to and bottom" and having asloping rear wa l 63, an upright front wall 64, and side walls 65 whichare preferably inclined inwa-rdl towards the bottom as I shown. The hopr as'side and end flanges 66, 67 respective y at itsv to by which it-is.

secured to the bottom of t e trough 20 beneath adischarge opening 68- inthe trough 20 as by bolts 69. If desired, the opening 68 may providedwith a screen or grate 70.

Discharge of the material from the settling boxes is controlled byvalves at the bottoms of the boxes. Each valve preferably consists of apanor shallow receptacle 72 extending across the lower open end 71 ofthe hopper and secured to the lower ends of upright straps 73. The valveis adapted to have a limited movement downwardly away from the open end71 of the hopper, as by connecting the upper ends of the straps 73 tothe ends of a pair of levers 75, see Figs. 11 and 15, which are securedto a rock shaft 76 on the top of-tl1e trough 20 and to which is securedan arm provided with an adjustable counterweight 77. This weightnormally holds the valve in a substantially closed position withmaterial therein surrounding the open end 71 of the hopper, and thevalve being adapted to open in a manner to be explained later. i

An important feature of the construction described is that the upperscreening units 15, lateral inclined screens 21 and associated inclinedplates 23, and the washing and settling boxes 24 are all constructed soas to be interchangeabl attached to the chute 14 or trough 20 so tiatany of these units can be positioned either on said chute or on saidtrough as desired, depending on the character of the material to beseparated. For this purpose the spaces in the bottoms of said chute andtrough, between the different units mounted thereon, are closed bremovable bottom plates or members 79, t e len th of which issubstantially the same as the length of the supporting frames 27 for theunits 15 or the frames 64 of the settling box units 24. The holes in thechute 15 and trough 20 for the securing bolts for said units and for thebottom plates 79 in the chute 14 and trough 20 are all on like centers,and the various units and plates can therefore be shifted and'se curedin diflerent relative positions as de-- sired.

In the use of the'washing, separating and grading apparatus, as thus fardescribed, and assuming that material comprising sand, gravel and wateris to be treated, the mixture from the nozzle 12 is delivered underpressure by the pump 10 to the upper end of the chute 14, While Wateralone and under pressure is preferably discharged into the trough 20,through a pipe 13 from another pump '10", Fig. 3.

In the particular arrangement shown in Figs. 1 and 3, there are nolateral screens associated with the screening units v15 at the left orupper end of the chute 14, and the sliding gates 34: for these unitswill, therefore, be closed to allow all of the material to pass overthese units to the units atthe lower or right hand end of the chute 14and the settling boxes beneath the closed units 15 will be inactive.

The material is thoroughly agitated in its passage down the chute 14,and the gravel which is small enough will pass with the sand and some ofthe water through the screening units 15, while the large stones anddebris will be carried with the bulk of the water over these units andbe directed overboard through the box 16 and passage 17. The gravel,sand and water accepted by the screening units 15 will be dischargedupon the lateral separating screens 21, the gravel traveling over thetop surfaces thereof and tailing off over their lower ends, while thesand and the water will pass through these screens and be directed bythe inclined plates 23 into the trough 20, and the sand will thenravitate over the inclined walls 63 of the was ing and settling boxes 24and upon the valves or pans,

In apparatus heretofore used, the sand and water were dischargeddirectly. into the hold or compartments of the boat, the water beingradually displaced by sand settling in the old until the water finallyoverfiowed the hatch coamings andv thence went overboard. This method,however, permitted mud and other sediment to remain with the sand andprevented the sand from being retained in a clean condition.

The provision of the washing and settllng boxes of the resent invention,however, enables the sand to be thoroughly washed and the mud andsediment removed before it is discharged from the trough 20,, and alsopermits the sand to be delivered to the hold with a minimum of water.This is accomplished as follows.

As the sand and more or less muddy water is deposited in the trough 20from the plates 23, it is met by the current of water discharged fromthe pi e 13 which, flowing into the boxes causes a t orough agitation ofthe material, and the sand gradually settles upon the valves 72, whilethe mud is held in sus-' pension and is carried away down the troughwith the water. The valves 7 2 are so counterbalanced by the weights 74that the receptacles 72 and also a considerable portion; of the hoppersare filled with sand before the weight of sand and water is suificientto. overcome the counterweights and permit the valves to. descend. Asthe valves descend, some of the sand spills out over the edges of thevalves, and owing to the consequent reduction in the weight 0 weightswill return the valves to substantially closed position, as in Fig. 11,before allof the sand has been dumped. Therefore, there is always a laer of sand in the valve or rece sand in the boxes, the counter-- tacle72 su cient to seal the lower end of t e settlin box hopper and preventthe water above t e sand from flowing out of the bottom The action ofthe valves is entirely automatic, and they need no attention other thanto adjust the weights in accordance with the workarranged as shown atthe left hand side of Figs. 1 and 3, so thatthe sand would pass directlythrough the screens 15 into the settling boxes- For this work, thebaffle plates 37 are particularly advantageous for preventingthespilling of the material. The

sand upon reaching the.trou gh 24, would be subjected to the washingaction of the stream of water therein, and be thoroughly cleaned beforebeing discharged into the hold.

The various units of the apparatus can be arranged in still other waysfor particular purposes, and the lateral screens 21, by reason of thedetachable, transverse supporting plates' 49, are readily removable soas to be positioned on any of the units 15.

The transverse supporting frames 11, 11 and 11 before mentioned, arepreferably of A shape as shown, each having upright spaced legs 80connected by upper and intermediate horizontal cross members 81, 82,upon which the chute 14 and trough 20 respectively are disposed atsuccessively lower elevations to provide the required inclination forsaid chute and trough.

It is desirable that the washing, grading and separating apparatus becapable of transverse movement relatively to the length ofthe boat inorder that it may be positioned over different portions of the hatchwaysas necessary. Also, ...when desired, the apparatus should be movable toa position over the deck at one side of said hatches, so as to leave thehatches entirely unobstructed to permit the use of unloading apparatusfor removing the cargo.

For this purpose, the lower ends of the frame legs 80 are connected totrucks or supports 83 having wheels or rollers 84 adapted to travel onguide tracks or rails 85 mounted on the transverse hatch coamings orother parts of the boat. Removable extension rails or tracks 86, Figs. 3and 4, are arranged transversely of the deck atone side of the boat, andare disposed in line with the track rails 85, whereby the entireapparatus can be moved laterally by first disconnecting the pipes orpassages 13, 13*,and the connections for the discharge passage 17.

Preferably the legs 80 ofone or more of the supporting frames are ofknockdown construction, as by forming each leg of two parts connected bya detachable gusset or plate 88, see Fig. 5, so that, by disconnectingthe gussets and the lower'portions of the legs, as shown in dotted linesin said figure, the chute 14 and trough 20 with their attachedseparating units, maybe lowered substantially to the horizontal positionshown in Fig. 2, and in dotted lines at the right o'f Fig. 4. By thisarrangement, the apparatu can be reduced in height whennot inguse,

and when positioned at the side'of the'boat, unloading apparatusindicated :by dotted lines in Fig. 4, can be moved along-:theboat overthe washing, grading and separating apparatus. Alsothe apparatus,tliuS.;QQ1- lapsed, lies close to .the deck, :where it ca n. be securelylashed in place to prevent swaying or dislocation thereof duringroughfweather.

It will also be noted by' reference to Fig; 5

4, thatthe washing, separating-and grading apparatus is of relativelynarrow dimensions laterally, and is of'such compact form that unloadingor other apparatus can pass freely over the same while in its amidshipsposition without collapsing or otherwise disturbing the washing,separating and grading apparatus.

I claim as my invention r s 1. In an apparatus of the characterdescribed, the combination of a substantially unobstructed inclinedchute into which the material is introduced, a screen in the bot tomthereof through which-material passes,

a substantially unobstructed trough! disposed;

below said chute and inclined insubstantially the same directionya'mater-ialwashing and settling unit in the bottom of said trough intowhich material is deliveredfrom said screen, means for introducing a'streainofwater into said unit to wash the material and remove refusetherefro1n,and means for automatically and intermittently dischargingwashedmaterial from said settling unit.

2. In an apparatus of the character described, the combination of aninclined chute into the upper portion of which solidmaterial to beseparated and water are delivered and along which they are adapted toflow at a relatively high velocity, a series 'of screens in the bottomthereof over which the material passes in succession'and through each'of which some of the water and a portion of the material of all gradesto here tained may pass and over which therefuse material is moved downthe chute by the water, an inclined secondary screen arranged to receivethe material passing through each of said first screens and throughwhich water and fine material pass to separate the coarsematerial fromthe fine material, a

trough arranged beneath and inclined insubsta'ntially the same directlonas sald' g c-hute trough while the washedmaterial. is permitted tosettle in said unit.

3. In an apparatus of the character described, the combination of asubstantially member upon which the fine material and Water fall, atrough into which said inclined 'member delivers said fine material andwater, a washing and settling unit associated with said trough intowhich said fine material and water are directed and from which therefuse is washed out and carried away therefrom by the water while thewashed material is permitted to settle in said unit.

4. In an apparatus of the character described, the combination of aninclined chute into which solid material and water are introduced, asuccession of spaced screens in the bottom of said chute through whichthe material to be retained and a portion of the water pass while therefuse material is moved over said screens by the water, an inclinedscreen arranged to I receive the material passing through each of saidfirst screens and which is constructed to separate the coarse materialfrom the fine material and water, a trough into which said fine materialand water passing through said inclined screens are delivered, a washingand settling unit associated with said trough into which the finematerial and water are directed, means for delivering an additionalvolume of water to said trough for agitating and washing the material insaid unit and removing the refuse therefrom while said washed materialis permitted to settle in said unit.

5. In an apparatus of the character described, the combination of aninclined chute into which solid material and water are introduced andalong which'they are caused to flow at a relatively high velocity, ascreen in the bottom thereof through which the material to be retainedand some of the water pass and over which the refuse material is movedalong down the chute by a relatively large portion of the water, aninclined screen which is arranged to receive said material and waterfrom said first screen, and constructed so that the-coarse materialpasses over the same and is discharged from the end thereof by thevelocity of the material, while the fine material and water pass throughsaid screen, an inclined member upon which the fine material falls, atrough extending lengthwise beneath said chute and inclinedinsubstantially the same direction and into which said inclinedmemberdirects said fine material,anda

first screen under momentum and which is constructed to separate thecoarse material from the fine material, a second chute extendinglengthwise below said first chute and inclined in substantially the samedirection, an inclined member adapted to receive fine material and waterpassing through said inclined screen and direct them into said secondchute, a pivotal support for said inclined screen, a

pivotal connection between said inclined screen and, said inclinedmember, and means adapting adjustment of said parts about said pivots tovary the inclination of said inclined screen to change the velocity ofthe material passing thereover and thereby control the separation ofsaid material.

7. In an apparatus of the character described, the combination of aninclined chute having a screened opening in the bottom thereof overwhich the material is passed in a current of water at a relatively highvelocity and which is constructed to permit the desired material to passtherethrough with water, and aflat baffle plate which is arrangedbeneath substantially parallel with and close to said screen and has anextended aperture therein of substantially less area than said openingso as to provide ledges extending into said opening adapted to intercepta portion of the material and water passing through said opening fordirecting the material and water substantially perpendicularly downwardfrom said opening in said chute and minimize lateral spreading of saidmaterial and water.

8. In an apparatus of the character described, the combination of aninclined chute to the upper part of which the water and solid materialare delivered and along which they flow at a relatively high velocity, aplurality of separating screens in the bottom of the chute over whichthe refuse material is moved in succession by the water and-throughwhich the material to be retained passes, an inclined trough disposedbelow said chute, a plurality of inclined separating screens extendinglaterally from beneath said chute and each arranged to, receive thematerial passing through one of the first screens, means for conductingmaterial passing through said lateral screens tosaid trough, andaplurality of washing and settling units in the bottom of said trough,said first mentioned screens and said washing 'andsettling units beingremovably mounted and adapted to be interchanged one with the other onsaid chute and trough,

and said lateral screens being detachably and interchangeably mounted. av

9. In an apparatus of the character described, the combination of asubstantially unobstructed inclined chute throughout the length of whichwater and solid materialare adapted to flow at a r'elatively highvelocity, a plurality of s aced apart separating screens in the bottom t1ereof,@an inclined trough disposed below said chute, inclined s screensmounted on and extending aterally from the. under side of. said chute,means connected to said lateral screens for co ducting material fromsaid lateral screens to said trough, and a plurality of washing andsettling units in the bottom of said trough, said first mentionedscreens and said washing and settling units-being removably mount d andadapted to be interchanged one with the other on said chute and trou h,and said lateral screens being detachabfiy and interchengeably mountedon said other screens.- t I J v 10. In an apparatus of the characterdescribed, the combination of an inclinedclyite,

a plurality of separating screens in the ottom thereof, aninclinedtrough disposed low said chute,,a plurality of washing nd separatingunits in the bottom of said trough,

ing separating instrumentalities mounted thereon, and a plurality ofspaced, transverse supportingmembers on which said troughs are securedsoas to incline lengthwise,'a supy porting member to which the lowerends of both troughs ,are secured, and other support,- ing membersarrangedoin spaced relation to said first support and to whichsaidtroughs are also secured, said other supporting memhere beingcollapsible so, as to permit said troughs to be lowered while beingsupported- [at said lower end on said end support to'a substantiallyhorizontal position at the elevation of their lower ends; 1

' 12. In an apparatus of the character 'described, thecombination of apair of troughs arranged one below the other and each having separatinginstrumentalities mounted thereon, and a plurality of spaced, transversesupportlng members on which said troughs are secured so as to inclinelengthwise, a support-- ing member to which the lower ends of bothtroughs are secured, other supporting memarating,

bers arranged in spaced relation' to said first support and to whichsaid troughs are also secured, said other supporting members beingcollapsible so as to permit said troughs to be lowered while beingsupported at said lower end on' said end support to a substantiallyhorizontal position at the elevation of their lower ends, and transverseroller trucks for said supports adapted to permitsaid-apparatus to Iraised orv lowered position of said troughs.

13; In an apparatus of the character described, the combination with aboat, of a e moved transversely in either the pair of troughs arrangedone below the other.

and'adapted to extend lengthwise over the hatches of the boat,separating instrumentalities on said troughs adapted to wash, separateand grade material and discharge the same through said hatches, spacedsupporting members fwhich extend transversely of said troughs and towhich said, troughsfiare se cured so as to incline lengthwise, andtransverse roller trucks for said supports whereby said apparatus can bemoved laterally to a position on the boat at one side of said hatches toleave the hatches unobstructed.

14. In an apparatus of the character described, the combination with aboat, of a pair of troughs arranged one below the other and adapted toextend lengthwise over the hatches of the boat, separatinginstrumentalities on 1 said troughs adapted to wash, separate and gradematerial and discharge the same through said hatches, spaced supportingmembers which extend transversely of said troughs and to which saidtroughs are secured so as to incline lengthwise, one or more of saidsupporting members being collapsible to permit said troughs to beloweredto a substantially horizontal position without disconnecting saidtroughs or said separating 1nstrumental1t1es,and transverse rollertrucks 1 forsaid supporting members ada'ptedto permit 'saidapparatus tobe moved laterally in either the raised or lowered position of said llOtroughs to a position at one side of said hatchestoleave said hatchesunobstructed.

15. The combination with a boat, of apparatus arranged over the holdthereof and comprising an inclinedchute extendin -lengthwise'of theboat, means for introducing solid material and water into the upperportionof said chute, screens in the bottom thereof at diiierent' pointsalong the chute through which screens material to be retainedpasses andover which refuse material and a portion of the water pass down thechute, an inclined secondary screen arranged to receive the ma: terialfrom each of said first screens and through which the fine materialpasses to separate it from the coarse material which 4 discharges overthe screen into the boat, a trough extending lengthwise of the boatbelow said chute and into which said fine material-and water passingthrough said in;

clined screens are received, and washing and settling units along thebottom of said trou h into which the fine material and water are irectedand from which the refuse is washed out and carried away therefrom alongsaid trough while the Washed material is permitted to settle in saidunits, said unit being adapted to discharge said washed material intosaid hold.

16. In an apparatus of the character described, the combination of asubstantially unobstructed inclined chute, means for delivering waterand solid material to the upper portion of the chute and causing them toflow down the chute at a relatively high velocity, a succession ofprimary screens along the bottom of the chute and over which thematerial passes in succession and through which some of the water andmaterial pass while the refuse material is moved along down the chuteover said screens by the water, secondary screening means arranged toseparately receive the water and material passing through each of theprimary screens and deliver the coarse material tailing off of thesecondary screening means to a desired point, means arranged to receivethe water and finer material passing through said secondar screeningmeans and direct the same to a di ferent point, and means forselectively regulating as desired the quantity of material passingthrough the different primary screens.

17. In an apparatus of the character described, the combination of asubstantially unobstructed inclined chute, means for delivering waterand solid material to the upper portion of the chute and causinglthem toflow down the chute at a relatively igh velocity, a succession ofscreens along the bottom of the chute over which the material passes insuccession and through which some of the passing through said secondarywater and material pass while the refuse material is moved along downthe chute over said screens by the water, an inclined second chutearranged lengthwise below said first chute, secondary screening meansarranged to separately receive the water and material passing througheach of said chute screens and direct the coarse material tailing oilthe secondary screening means awayfrom said second chute, the water andfiner material screening means being received and conducted by saisecond chute away from the tailings from said secondary screening means,and controlling means for selectively regulatingthe quantity of materialpassing through the different chute screens as desired.

18. In an apparatus of the character described, the combination of asubstantially unobstructed inclined chute, means for de- .down--'.ft hechute at a relatively livering water and solid material to the up erportion of the chute and causinglthfim tlo rtiw 1g ve 001 y,

a succession ofrimary coarse screens along the bottom of t e chute andover which the material passes in succession and through each of whichsome of the water. and a portion of the material of all grades to beretained may pass while the refuse material is moved along down thechute over said screens by the water, an inclined second chute arrangedlengthwisebelow and substantially parallel to said first chute, and aplurality of secondary finer screens each arranged to receive the waterand solid material passing through one of the primary screens anddeliver the coarse material tailing off of the secondary screens awayfrom said second chute, the water and material passing through saidsecondary screens being received by said second chute and kept away fromthe tailings from said secondary screens,

19. In an apparatus of the character described, the combination of asubstantially unobstructed inclined chute, means for delivering watenandsolid material to the up er portion of the chute and causin them to owdown the chute at a relatively high velocity, a succession of rimarycoarse screens along the bottom of tlie chute and over which thematerial passes in succession and through each of which some ofthe'water and a portion of the material of all grades to be retained maypass while the refuse material is.

moved along down the chute over said screens by the water, an inclinedsecond chute arranged lengthwise below said first chute, and a(plurality of secondary screens each arrange to receive the water andsolid material passing through one of the rimary screens and deliver thecoarse material tailing off of the secondary screens away from saidsecond chute, means for directing the water and material tpassingthrough-sand secondary screens to sai away from the tailings from saidsecondary screens, and means for selectively regulating as desired theuantity of material passing through the di erent primary screens.

' 20. Inan apparatus of the character described, the combination of asubstantially" down the chute over said screens by the water, aplurality ofinclined secondary screens each disposed to receive thewater and material passin through one of the primary screens and de iverthe tailings from said secondary screens laterall away from said secondchute, means arrange to direct the water and material passing throughsaid secondary screens lplrimary coarse screens along e chute and overwhich the second chute for carrying the same away from thetailingstherefrom, and means for selectively regulating as .desired thequantity of' material passing through-the difierent primary screens.

21. In an apparatus of the character described, the combination of asubstantially unobstructed inclined chute, means for del1verin water andsolid material to the up er portion of the chute and causing them to owdown the chute at a relatively high velocity, a succession of screensalong the bottom of the chute over which the material passes insuccession and through which some of the water and material pass whilethe refuse material isfmoved along down the chute over said screens bythe water, oppositel alrrangedlateral secondary'screens, eac disposed toreceive the water and material passing through one of the chute screens,and to direct the tailings from said secondary screens to opposite sidesof said chute to diflerent desired points, means arranged to direct thewater and material passing through said secondary screens away from thetaih'ngs therefrom, and means for se'-, lectively regulating as desiredthe quantity of material 22. In an apparatus of the character described,the combination of a substantially unobstructed inclined chute, meansarranged to deliver li uid and solid material under pressure to t eupper portion of the chute and cause them to flow downthe chute at arelatively high velocity, a succession of spaced primary screens alongthe bottom of the chute and separated by imperforate chute bottomportions and over which said material passes in successionand througheach of which some of the liquid and a portion of the solid material ofall grades to be retained may pass, while the refuse material is movedalong down the chute by the liquid to discharge beyond the screens,secondary screening means arranged to separately receive'the liquid andsolidmaterial passing through each of the primary screens and direct thesolid material tailing off of the, secondary screening means to adesired point,

and means arranged to direct the liquid and fine material passingthrough said secondary screening means away from the solid materialtailing oil? of the secondary screening'means.

23. The combination with a boat, of a substantially unobstructedinclined chute extendin lengthwise of the boat over the hold thereomeans arranged to deliver water, sand and gravel under pressure to theup er Qpgrtion of the chute and cause them to 0W 1 wn the chute at arelatively high velocity, a succession of primary coarse screens alongthe bottom of the chute over which said material passes in successionand through each of which some of the water and a portion of the sandand gravel of all grades to be repassing through the difi'erent' chutescreens.

tained may pass, while the refuse material is moved along down the chuteby the water to discharge beyond the screens, a plurality of secondaryscreens each arranged to receive the water, sand and gravel passinthrough one of. the primary screens and irect t e gravel into the holdof the boat, said secondary screens being adapted to direct the gravelto different desired pointslengthwise ofthe boat and means arranged tokeep separated from the gravel and'to discharge overboard the waterpassing through the chute screens I and said secondary screens.

24. The combination with a, boat, of a substantially unobstructedinclined chute extendin lengthwise of the boat over the hold thereomeans arranged to deliver water, sand and gravel under pressure to theup er portion of the chute and cause' them to ow down the chute at arelatively high velocity, a succession of primary screens along thebottom of the .chute over which said material passes in succession andthrough which some of the water, sand and gravel pass, while the refuse'material is moved along down the chute by the water to discharge beyondthe screens, secondary screening means arranged to receive the water,sand and gravel passlng I through each of the primary screens and directthe gravel into the hold of the boat, means arranged to keepseparatedfrom the gravel and to discharge overboard the water passing through theprimary screens and said secondar screening means, and means for indepenently controlling the discharge of the material through the severalprimary screens whereby the delivery of gravel from the secondaryscreening means to different parts of the boat can be re ulated as maybe necessary to evenly load the boat. a

25. The combination with a boat,'of asubstantiall tendin engthwise ofthe boat over the hold unobstructed inclined chute, ex-' thereo meansarranged to deliver water,

sand and gravel under pressure to the upper portion of the chute andcause them to flow' down the chute at a relatively'high velocity, Iasuccession of primary screens along the bottom of the chute over whichsaid material passes in succession and through which some of the water,sand and gravel pass, while the;

refuse material is moved along down the chute by the water to dischargebeyond the screens, a plurality of secondary screens each arranged toreceive the water, sand and gravel passing through one I of the primary"screens and direct the gravel into the hold of the boat, means'arrangedto dischar e. overboard the water passing through t e,

primary screens and said secondary screens, and independently adjustabletrolling the discharge throug th'e'several primary screens whereby thedelivery of gravel to different. parts of the boat caga be regulated asdesired.

tes for' con- 26. The combination with a boat, of a substantiallunobstructed inclined chute extendin engthwise of the boat over the holdthereo means arranged to deliver water, sand and gravel under pressureto the upper portion of the chute and cause them to flow down the chuteat a relatively high velocity, a succession of primary screens along thebottom of the chute over which said material passes in succession andthrough which some of the water, sand and gravel pass, while the maryscreens tosaid secondary screens,

refuse material is moved along down the chute by the water to dischargebeyond the screens, a plurality of secondary screens arranged along thechute to-receive the water, sand and gravel passing through said primaryscreens and separate the gravel therefrom and discharge the gravel intothe hold of the boat to the side of the chute, and independentlyadjustable gates for controlling the delivery of material through theseveral priwhereby the delivery of gravel to different parts of the boatlengthwise and crosswise thereof can be regulated as desired.

27. The combination with a boat, of a substantially unobstructedinclined chute extendin lengthwise of the boat over the hold thereof,means for delivering solid material with a relatively large proportionof water to the upper portion of the chute and causing them to flow-downthe chute at a relatively high velocity, a longitudinal series of spaceding to separate the coarse material from the water and finer materialand direct the separated difi'erent materials to different locations onthe boat.

28. In an apparatus for separating solid materials from water, thecombination of a stationary inclined chute the length of which is manytimes its width, means for delivering solid materials with a relativelylarge volume of water to""the upper portion of the chute and causingthem to flow down the chute at a relatively high velocity, said chutebeing constructed to provide bottom openings through which the water andsolid material are adapted to discharge from the chute at a plurality ofpoints along the length of the chute, said openings being of suchdimensions and character-and said chute being so constructed that aportion of the water and material of all grades to be retained maydischarge from the chute through each of said openings while arelatively large volume of the water will flow at a high velocity downthe chute over said openings and move refuse material over the openingsfor discharge beyond the openings, a second chute arranged to receivethe water and material discharging through said first chute openings andalong which the water is adapted to flow for discharge at a desiredpoint, and secondary screening means arranged to receive the water andmaterial discharging from each of said chute openings and direct the.coarser material away from said second chute while said second chutebeing disposed relatively to said secondary screening means to receivethe water and fine material passing through all the openings of thefirst mentioned chute. I

29. The combination with a boat, of a substantially unobstructedinclined chute extending lengthwise of the boat over the hold thereof,means for delivering solid material with a relatively'large proportionof water to the upper portion of the chute and causing them to flow downthe chute at a relatively rapid rate, there being a longitudinal seriesof spaced apart screened openings in the bottom of the chute over whichthejmaterial passes in succession and through each of which some of thewater and a portion of the material of all grades to be retained maypass and over which the refuse material is moved along down the chute bythe water, secondary screening means arranged transversely of the boataxis to receive the water and materialpassingthrough each of saidscreened openings, and -meansextending beneath said. screenlng means andarranged longitudinal- 1y of the boat for directing the water and'finematerial passing throu h said screening means to a difl'erent locationon the boat.

30. In a separating apparatus, an inclined chute the length of which ismany times its width, means for delivering solid materials and arelatively large volume of water tothe upper end of said chute andcausing them to.

flow down the chute at a relatively rapid rate, said chute havingscreened openings in the bottom at intervals along its length to eachdischarge a small portion of the water and materials small enough topass through each of said screened openings, secondary screenmg meansarranged to recelve the water and material from said screened openingsin the receiving all the water and finer particles passing through saidscreen means and conveying them away by the flow of the water contentthereof. a

HOWARD S. GERKEN.

DISCLAIMER 1,729,07O.H0ward S. Gerlcen, Buffalo, N. Y. APPARA'rusFonWAsHnve, SEP- ARATING, AND GRADING MATERIALS. Patent dated September24, 1929. Disclaimer filed June 7, 1934, by the assignee, GravelProducts Corporation.

Hereby enters this disclaimer to that part of the claim in saidspecification, which consists of claims numbered 26 and 27, which areinthe following words, to wit: Y

26. The combination with a boat, of a substantially unobstructedinclined chute extending lengthwise of the boat over the hold thereof,means arranged to deliver water, sand and gravel under pressure to theupper portion of the chute andcause them to flow down the chute at arelatively high velocity, a succession of primary screens alongthebottom of the chute over which said material passes in succession andthrough which some of the water, sand and gravel pass, while the refusematerial is moved along down the chute by. the water to discharge beyondthe screens, a plurality of secondary screens arranged along the chuteto receive v the water, sand and gravel passing through said primaryscreens and separate the gravel therefrom and discharge the gravel intothe hold of the boat to the side of the chute, and independentlyadjustable gates for controlling the delivery of material through theseveral primary screens to said secondary screens, whereby the deliveryof gravel to different parts of the boat lengthwise and crosswisethereof can be regulated as desired.

27. The combination with a boat, of a substantially unobstructedinclined chute extending lengthwise of the boat over the hold thereof,means for delivering i solid material with a relatively large proportionof water to the upper portion of the chute and causing them to flow downthe chute at a relatively high velocity, a longitudinal series'of spacedapart screened openings'in'the bottom-of the chute over which thematerial passes in succession and through each of which some of a thewater and a portion of the material of all grades to be retained maypass and over which the refuse material is moved along down the chute bythe water, secondary screening means arranged to receive the water andmaterial passing through each of said screened openings, said secondaryscreening means and means cooperating therewith acting to separate thecoarse material from the water and finer material and direct theseparated different materials to different locations on the boat.

[Ofiicial Gazette June 26, 1934.]

DISCLAIMER 1,729,070.Howard S. Gerken, Buffalo, N. Y. APPARATUS FORWASHING, SEPA- RATING, AND GRADING MATERIALS. Patent dated September 24,1929. Disclaimer filed November 14, 1935, by the assignee, GravelProducts Corporation.

Hereby enters disclaimer to that part of the claims in saidspecification which is in the following words, to wit:

16. In an apparatus of the character described, the combination of asubstantially unobstructed inclined chute, means for delivering waterand solid material to the upper portion of the chute and causing them toflow down the chute at a relatively high velocity, a succession ofprimary screens along the bottom of the chute and over which thematerial passes in succession and through which some of the water andmaterial pass while the refuse material is moved along down the chuteover said screens by the water, secondary screening means arranged toseparately receive the water and material passing through each of theprimary screens and deliver the coarse material tailing oil of thesecondary screening means to a desired point, means arranged to receivethe water and finer material passing through said secondary screeningmeans and direct the same to a different point, and means forselectively regulating as desired the quantity of material passingthrough the different primary screens.

17. In an apparatus of the character described, the combination of asubstantially unobstructed inclined chute, means for delivering waterand solid material to the upper portion of the chute and causing them toflow down the chute at a relatively high velocity, a succession ofscreens along the bottom of the chute over which the material passes insuccession and through which some of the water and material pass whilethe refuse material is moved along down the chute over said screens bythe water, an inclined second chute arranged lengthwise below said firstchute, secondary screening means arranged to separately receive thewater and material passing through each of said chute screens and directthe coarse material tailing off the secondary screening means away fromsaid second chute, the water and finer material passing through saidsecondary screening means being received and conducted by said secondchute away from the tailings from said secondary screening means, andcontrolling means for selectively regulating the quantity of materialpassing through the different chute screens as desired.

18. In an apparatus of the character described, the combination of asubstantially unobstructed inclined chute, means for delivering waterand solid material to the upper portion of the chute and causing them toflow down the chute at a rela tively high velocity, a succession ofprimary coarse screens along the bottom of the chute and over which thematerial passes in succession and through each of which some of thewater and a portion of the material of all grades to be retained maypass while the refuse material is moved along down the chute over saidscreens by the water, an inclined second chute arranged lengthwise belowand substantially parallel to said first chute, and a plurality ofsecondary finer screens each arranged to receive the water and solidmaterial passing "through one of the primary screens and deliver thecoarse material tailing off of the secondary screens away from saidsecond chute, the water and material passing through said secondaryscreens being received by said second chute and kept away from thetailings from said secondary screens.

'19. In an apparatus of the character described, the combination of asubstantially unobstructed inclined chute, means for delivering waterand solid material to the upper portion of the chute and causing them toflow down the chute at a relatively high velocity, a successionofprimary coarse screens along the bottom of the chute and over whichthe material passes in succession and through each of which some of thewater and a portion of the material of all grades to be retained maypass while the refuse material is moved along down the chute over saidscreens by the water, an inclined second chute arranged lengthwise belowsaid first chute, and a plurality of secondary screens each arranged toreceive the water and solid material passing through one of the primaryscreens and deliver the coarse material tailing off of'the secondaryscreens away from said second chute, means for directing the water andmaterial passing through said secondary screens to said second chute forcarrying the same away from the tailings from said secondary screens,and means for selectively regulating as desired the quantity of materialpassing through the different primary screens. 7

20. In an apparatus of the character described, the combination of asubstantially unobstructed inclined chute, means for delivering waterand solid material to the upper portion of the chute and causing them toflow down the chute at a relatively high velocity, a succession ofprimary coarse screens along the bottom of the chute and over which thematerial passes in succession and through which some of the water andmaterial pass while the refuse material is moved along down the chuteover said screens by the water, a plurality of inclined secondaryscreens each disposed to receive the water and material passing throughone of the primary screens and deliver the tailings from said secondaryscreens laterally away from said second chute, means arranged to directthe water and material passing through said secondary screens away fromthe tailings therefrom, and means for selectively regulating as desiredthe quantity of material passing through the different primary screens.

'21. In an apparatus of the character described, the combination of asubstantially unobstructed inclined chute, means for delivering waterand solid material to the upper portion of the chute and causing them toflow down the chute at a relatively high velocity, a succession ofscreens along the bottom of the chute over which the material passes insuccession and through which some of the water and material pass whilethe refuse material is moved along down the chute over said screens bythe water, oppositely arranged lateral secondary screens, each disposedto receive the water and material passing through one of the chutescreens, and to direct the tailings from said secondary screens toopposite sides of said chute to different desired points, means arrangedto direct the water and material passing through said secondary screensaway from the tailings therefrom, and means for selectively regulatingas desired the quantity of material passing through the different chutescreens.

22. In an apparatus of the character described, the combination of asubstantially unobstructed inclined chute, means arranged to deliverliquid and solid material under pressure to the upper portion of thechute and cause them to flow down the chute at a relatively highvelocity, a succession of spaced primary screens along the bottom of thechute and separated by imperforate chute bottom portions and over whichsaid material passes in succession and through each of which some of theliquid and a portion of the solid material of all grades to be retainedmay pass, while the refuse material is moved along down the chute by theliquid to discharge 'beyond the screens, secondary screening meansarranged to separately receive the liquid and solid material passingthrough each of the primary screens and direct the solid materialtailing off of the secondary screening means to a desired point, andmeans arranged to direct the liquid and fine material passing throughsaid secondary screening means away from the solid material tailing offof the secondary screening means.

23. The combination with a boat, of a substantially unobstructedinclined chute extending lengthwise of the boat over the hold thereof,means arranged to deliver water, sand and gravel under pressure to theupper portion of the chute and cause them to flow down the chute at arelatively high velocity, a succession of primary coarse screens alongthe bottom of the chute over which said material passes in successionand through each of which some of the water and a portion of the sandand gravel of all grades to be retained may pass, while the refusematerial is moved along down the chute by the water to discharge beyondthe screens, a plurality of secondary screens each arranged to receivethe water, sand and gravel passing through one of the primary screensand direct the gravel into the hold of the boat, said secondary screensbeing adapted to direct the gravel to different desired pointslengthwise of the boat and means arranged to keep separated from thegravel and to discharge overboard the water passing through the chutescreens and said secondary screens.

24. The combination with a boat, of a substantially unobstructedinclined chute extending lengthwise of the boat over the hold thereof,means arranged to deliver water, sand and gravel under pressure to theupper portion of the chute and cause them to flow down the chute at arelatively high velocity, a succession of primary screens along thebottom of the chute over which said material passes in succession andthrough which some of the water, sand and gravel pass, while the refusematerial is moved along down the chute by the water to discharge beyondthe screens, secondary screening means arranged to receive the water,sand and gravel passing through each of the primary screens and directthe gravel into the hold of the boat, means arranged to keep separatedfrom the gravel and to discharge overboard the water passing through theprimary screens and said secondary screening means, and means forindependently controlling the discharge of the material through theseveral primary screens whereby the delivery of gravel from thesecondary screening means tfi different parts of the boat can beregulated as may be necessary to evenly load t e oat.

25. The combination with a boat, of a substantially unobstructedinclined chute extending lengthwise of the boat over the hold thereof,means arranged to deliver water, sand and gravel under pressure to theupper portion of the chute and cause them to flow down the chute at arelatively high velocity, a succession of primary screens along thebottom of the chute over which said material passes in succession andthrough which some of the water, sand and gravel pass, while the refusematerial is moved along down the chute by the Water to discharge beyondthe screens, a plurality of secondary screens each arranged to receivethe water, sand and gravel passing through one of the primary screensand direct the gravel into the hold of the boat, means arranged todischarge overboard the water passing through the primary screens andsaid secondary screens, and independently adjustable gates forcontrolling the dischargethrough the several primary screens whereby thedelivery of gravel to different parts of the boat can be regulated asdesired.

28. In an apparatus for separating solid materials from water, thecombination of a stationary inclined chute the length of which is manytimes its width, means for delivering solid materials with a relativelylarge volume of water to the upper portion of the chute and causing themto flow down the chute at a relatively high velocity, said chute beingconstructed to provide bottom openings through which the water and solidmaterial are adapted to discharge from the chute at a plurality ofpoints along the length of the chute, said openings being of suchdimensions and character and said chute being so constructed that aportion of the Water and material of all grades to be retained maydischarge from the chute through each of said openings while arelatively large volume of the Water will flow at a high velocity downthe chute over said openings and move refuse material over the openingsfor discharge beyond the openings, a second chute arranged to receivethe water and material discharging through said first chute openings andalong which the water is adapted to flow for discharge at a desiredpoint, and secondary screening means arranged to receive the Water andmaterial discharging from each of said chute openings and direct thecoarser material away from said second chute while said second chutebeing disposed relatively to said secondary screening means to receivethe water and fine material passing through all the openings of thefirst mentioned chute.

29. The combination with a boat, of a substantially unobstructedinclined chute extending lengthwise of the boat over the hold thereof,means for delivering solid material with a relatively large proportionof water to the upper portion of the chute and causing them to flow downthe chute at a relatively rapid rate, there being a longitudinal seriesof spaced apart screened openings in the bottom of the chute over whichthe material passes in succession and through each of which some of thewater and a portion of the material of all grades to be retained maypass and over which the refuse material is moved along down the chute bythe Water, secondary screening means arranged transversely of the boataxis to receive the water and material passing through each of saidscreened openings, and means extending beneath said screening means andarranged longitudinally of the boat for directing the water and finematerial passing through said screening means to a different location onthe boat.

"30. In a separating apparatus, an inclined chute the length of which ismany times its Width, means for delivering solid materials and arelatively large volume of water to the upper end of said chute andcausing them to flow down the chute at a relatively rapid rate, saidchute having screened openings in the bottom at intervals along itslength to each discharge a small portion of the water and materialssmall enough to pass through each of said screened openings, secondaryscreening means arranged to receive the water and material from saidscreened openings in the chute and divert laterally the larger particlesthereof, said secondary means being adapted to pass the water and otherparticles received from said screened openings and a means for receivingall the water and finer particles passing through said screen means andconveying them away by the flow of the water content thereof.

[Ofiicial Gazette December 17, 1.985.]

DISCLAIM EIR 1,729, 07O.H0ward S. Gerlcen, Buffalo, N. Y. APPARATUS FORWASHING, SEP- ARATING, AND GRADING MATERIALs. Patent dated September 24,1929. Disclaimer filed June 7, 1934, by the assignee, Gretel ProductsCorporation.

Hereby enters this disclaimer to that part of the claim in saidspecification, which consists of claims numbered 26 and 27, which are inthe following words, to wit: 7

26. The combination with a boat, of a substantially unobstructedinclined chute extending lengthwise of the boat over the hold thereof,means arranged to deliver water, sand and gravel under pressure to theupper portion of the chute and cause them to How down the chute at arelatively high velocity, a succession of primary screens along thebottom of the chute over which said material passes in succession andthrough which. some of the water, sand and gravel pass, while the refusematerial is moved along down the chute by the water to discharge beyondthe screens, a plurality of secondary screens arranged along the chuteto receive the Water, sand and gravel passing through said primaryscreens and separate the gravel therefrom and discharge the gravel intothe hold of the boat to the side of the chute, and independentlyadjustable gates for controlling the delivery of material through theseveral primary screens to said secondary screens, whereby the deliveryof gravel to different parts of the boat lengthwise and crosswisethereof can be regulated as desired.

27. The combination with a boat, of a substantially unobstructedinclined chute extending lengthwise of the boat over the hold thereof,means for delivering solid material with a relatively large proportionof water to the upper portion of the chute and causing them to flow downthe chute at a relatively high velocity, a longitudinal series of spacedapart screened openings in the bottom of the chute over which thematerial passes in succession and through each of which some of thewater and a portion of the material of all grades to be retained maypass and over which the refuse material is moved along down the chute bythe water, secondary screening means arranged to receive the water andmaterial passing through each of said screened openings, said secondaryscreening means and means cooperating therewith acting to separate thecoarse material from the water and finer material and direct theseparated diflerent materials to dill'erent locations on the boat.

[Ofict'al Gazette June 26, 1934.]

